LOWER POWER CMOS CIRCUIT FOR HEARING AID FEEDBACK

用于助听器反馈的低功耗 CMOS 电路

• 批准号: 2687559
• 负责人: SIGFRID Daniel SOLI
• 金额: $ 46.11万
• 依托单位: HOUSE RESEARCH INSTITUTE
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2687559
• 关键词: biomedical equipment development; computer simulation; hearing aids; psychoacoustics

DESCRIPTION: The most important function of a hearing aid (HA) is to amplify sound so as to compensate for loss of auditory sensitivity caused by hearing impairment. The ability of any HA to fulfill this function can be significantly compromised where amplified sound output from the HA receiver reaches the microphone and i re-amplified, causing the process to repeat in a regenerative closed loop system. The familiar result is oscillatory feedback (FB), manifest as audible distortion of sound quality and high pitched squealing, which renders the HA useless. At present there exists no practical solution to the problem of FM other than to reduce the gain of the HA, and thus to compromise its most important function. The primary objective of the proposed research is to implement a HA algorithm that can substantially reduce the problem of FM. We plan to develop and evaluate a high performance digital FM cancellation algorithm in a low power H circuit, and to transfer this algorithm and circuit to a HA manufacturer for implementation in commercially available hearing aids. We propose to conduct a three-year program of algorithm simulation and real-time implementation, digital circuit design and fabrication, prototype hearing aid construction, an laboratory field trial evaluations with normally hearing and hearing impaired subjects.

描述： 助听器（HA）最重要的功能是放大声音 弥补因听力障碍而引起的听觉敏感性丧失。 任何HA实现此功能的能力都可以显着 在HA接收器的放大声音输出到达的地方妥协 麦克风和我重新扩增，导致该过程在A中重复 再生闭环系统。 熟悉的结果是振荡 反馈（FB），表现为声音质量的可听见扭曲和高 尖叫，使HA无用。 目前没有 实际解决了FM问题以外的其他问题 HA，从而损害其最重要的功能。 拟议研究的主要目的是实施HA 可以大大减少FM问题的算法。 我们计划 开发和评估高性能数字FM取消算法 低功率H电路，并将该算法和电路传递到HA 实施市售助听器的制造商。 我们 建议进行三年的算法模拟计划和 实时实施，数字电路设计和制造，原型 助听器建设，实验室现场试验评估 通常听到和听力受损的受试者。